non-magnetic drill collars 1.standardAPI Spec 7 and SY/T5114 2.competitive price 3.delivery promptly 4.high quality service

Non-magnetic drill collars

According to API Spec.7 and SY/T5144, the non-magnetic drill collars are made of low carbon stainless steel. All threads are cold rolled, and they are machined with CNC Lathes –Double –shouldered, including some special threads.

non-magnetic drill collars